采用氨水沉淀法合成了铜铈氧化物催化剂,在固定床反应器中考察了Cu-Ce摩尔比、煅烧温度对铜铈氧化物催化剂催化降解对二甲苯效果的影响。通过XRD、SEM、H₂-TPR表征了催化剂的理化性质。结果表明,Cu₁Ce₃-550催化剂具有分布均一的纳米颗粒和孔道结构,形成Cu-Ce固溶体,拥有最优的低温还原性。Cu-Ce摩尔比为1∶3、煅烧温度为550℃下制备的催化剂Cu₁Ce₃-550,在空速为15 000 h^-1、对二甲苯质量浓度为2 400 mg/m³条件下,表现出最优的催化性能。

Copper-cerium oxides catalyst is synthesized via ammonia precipitation method.The influences of different Cu-Ce molar ratios and calcination temperatures on the catalytic effect of CuCe oxide catalyst for degradation of xylene are evaluated in a fixed-bed reactor.The physicochemical properties of the catalyst are characterized by means of XRD,SEM and H₂-TPR.It is indicated that Cu₁Ce₃-550 catalyst has a uniform distribution of nanoparticles and pore structure,forms a Cu-Ce solid solution,and has the best low-temperature reducibility.The catalyst prepared at a Cu-Ce molar ratio of 1∶3 and a calcination temperature of 550℃ exhibits the best catalytic performance when the space velocity is 15 000 h^-1 and the concentration of p-xylene is 2 400 mg·m^-3.

汪志(1996-),男,硕士研究生,主要从事催化和吸附材料的研究,1509154667@qq.com。